MDN Web Docs
Error returned in executing first code example on "How to use promises" guide #478
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I am getting an error in this page in the first code example when trying to fetch using the browser console as directed. The error is:
The final response of the fetch command is:
The error does not occur when adding the code to a web page. Does anyone else get this error? |
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Replies: 1 comment 3 replies
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This is because const fetchPromise = fetch(
"https://developer.mozilla.org/en-US/docs/Learn/contributors.txt",
);
console.log(fetchPromise);
fetchPromise.then((response) => {
console.log(`Received response: ${response.status}`);
});
console.log("Started request…");Alternatively, if you wanted to try the example in the page, specifically, you could put it in a HTML document and open it in your browser: <!DOCTYPE html>
<title>Run fetch</title>
<script>
const fetchPromise = fetch(
"https://mdn.github.io/learning-area/javascript/apis/fetching-data/can-store/products.json"
);
console.log(fetchPromise);
fetchPromise.then((response) => {
console.log(`Received response: ${response.status}`);
});
console.log("Started request…");
</script>I think we may open a content issue to replace the URL in those examples (or check if |
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Thank you. I wanted to be sure whether or not something did need to be updated in the docs before making any edits. However, I think I will leave the editing for others to do as I am not aware of which pages are suitable to use instead. |
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You're welcome! I also just noticed that Will has pointed out the docs suggest visiting |
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We could do one of those things (more likely the first I would think), but there would still need to be explicit instructions about how to run the examples. For instance, if someone opens a new blank tab to run the examples in (which might be a fairly natural thing to try) then the examples still won't work. So either way, we need explicit instructions, and people have to read them. |
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This is because
mdn.github.iois not set in MDN's current CSP. You can give this a try in your console from any MDN page:Alternatively, if you wanted to try the example in the page, specifically, you could put it in a HTML document and open it in your browser: